source: frontend/node_modules/es-abstract/2015/ArraySpeciesCreate.js

'use strict';

var GetIntrinsic = require('get-intrinsic');

var $Array = GetIntrinsic('%Array%');
var $species = GetIntrinsic('%Symbol.species%', true);
var $TypeError = require('es-errors/type');
var isInteger = require('math-intrinsics/isInteger');
var isObject = require('es-object-atoms/isObject');

var Get = require('./Get');
var IsArray = require('./IsArray');
var IsConstructor = require('./IsConstructor');

// https://262.ecma-international.org/6.0/#sec-arrayspeciescreate

module.exports = function ArraySpeciesCreate(originalArray, length) {
        if (!isInteger(length) || length < 0) {
                throw new $TypeError('Assertion failed: length must be an integer >= 0');
        }
        var len = length === 0 ? 0 : length;
        var C;
        var isArray = IsArray(originalArray);
        if (isArray) {
                C = Get(originalArray, 'constructor');
                // TODO: figure out how to make a cross-realm normal Array, a same-realm Array
                // if (IsConstructor(C)) {
                //      if C is another realm's Array, C = undefined
                //      Object.getPrototypeOf(Object.getPrototypeOf(Object.getPrototypeOf(Array))) === null ?
                // }
                if ($species && isObject(C)) {
                        C = Get(C, $species);
                        if (C === null) {
                                C = void 0;
                        }
                }
        }
        if (typeof C === 'undefined') {
                return $Array(len);
        }
        if (!IsConstructor(C)) {
                throw new $TypeError('C must be a constructor');
        }
        return new C(len); // Construct(C, len);
};